Two rods of lengths `L_(1)` and `L_(2)` are welded together to make a composite rod of length `(L_(1)+L_(2))`. If the coefficient of linear expansion of the materials of the rod are `alpha_(1)` and `alpha_(2)` respectively. The effective coefficient of linear expansion of the composite rod is

If two rods of length L and 2L having coefficients of linear expansion alpha and 2alpha respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composite rod equals

There are two rods of length l_1 l_2 and coefficient of linear expansions are alpha_1 and alpha_2 respectively. Find equivalent coefficient of thermal expansion for their combination in series.

Two rods, one of aluminium and other made of steel, having initial lenghts l_(1) and l_(2) are connected together to form a singel rod of length (l_(1)+l_(2)) . The coefficient of linear expansions for aluminium and steel are alpha_(a) and alpha_(s) respectively. If length of each rod increases by same amount when their tempertures are raised by t^(@)C , then find the ratio l_(1) (l_(1)+l_(2)) .

Two metallic rods of length l and 3l have coefficient of linear expansion alpha and 3alpha respectively. The coefficient of linear expansion ofr their series combinations, is

The coefficient of linear expansion of an in homogeneous rod change linearly from alpha_(1) to alpha_(2) from one end to the other end of the rod. The effective coefficient of linear expansion of rod is

Two rods having length l_(1) and l_(2) , made of materials with the linear coefficient of expansion alpha_(1) and alpha_(2) were welded togther. The equivalent coefficients of linear expansion for the obtained rod:-

Two rods of length l_(1) and l_(2) are made of material whose coefficient of linear expansion are alpha_(1) and alpha_(2) , respectively. The difference between their lengths will be independent of temperatiure if l_(1)//l_(2) is to

Two metal rods of lengths L_(1) and L_(2) and coefficients of linear expansion alpha_(1) and alpha_(2) respectively are welded together to make a composite rod of length (L_(1)+L_(2)) at 0^(@)C. Find the effective coefficient of linear expansion of the composite rod.

Two rods having length l_1 and l_2 , made of materials with the linear expansion coefficient alpha_1 and alpha_2 , were soldered together. The equivalent coefficient of linear expansion for the obtained rod is